Passing data from form to form controller

[gonliSs]

Hello,

 

I've such form:

<form action="{$link->getPageLink('index', true)|escape:'html':'UTF-8'}" enctype="multipart/form-data" method="post" id="send_question">
                        <p>{l s='Jeśli masz listę produktów i wiesz czego szukasz'}<br>
                            {l s='dodaj poniżej plik w formacie np. pdf, doc, xls.'}</p>
                        <div class="form-group">
                            <input type="file" id="firstFile" name="firstFile">
                        </div>
                        <div class="form-group">
                            <input type="file" id="secondFile" name="secondFile">
                        </div>
                        <div class="form-group">
                            <label for="inputEmail">{l s='Na ten adres prześlemy wycenę oraz dostaniesz kopię tej wiadomości'}</label>
                            <input type="email" class="form-control" name="inputEmail" id="inputEmail" placeholder="{l s='Twój adres email'}">
                        </div>
                        <div class="form-group">
                            <label for="inputPhone">{l s='Poinformujemy cię o wysyłce wyceny'}</label>
                            <input type="text" id="inputPhone" name="inputPhone" class="form-control" placeholder="{l s='Twój numer telefonu'}">
                        </div>
                        <div class="form-group last-formgroup">
                            <label for="inputComment">{l s='Napisz komentarz o czym jeszcze powinniśmy pamiętać'}</label>
                            <textarea class="form-control" rows="3" id="inputComment" name="inputComment"></textarea>
                            <input type="hidden" name="submitThisForm" value="1">
                            <button type="submit" name="submitQuestion" id="submitQuestion" class="btn btn-default">
                                <span>{l s='Wyślij'}</span>
                            </button>
                        </div>
                    </form>

and I'd like to send it in ajax way. If I send it without ajax it works good, it sends email with attachments. But it has to be ajax form. How can I pass data from that form to index controller? I've such code by now and I don't know what to do next:

$(document).on('submit', '#send_question', function(e){
        e.preventDefault();


        $.ajax({
            type: 'POST',
            headers: { "cache-control": "no-cache" },
            url: baseUri + '?rand=' + new Date().getTime(),
            async: true,
            cache: false,
            dataType : "json",
            data: 'controller=index&ajax=true',
            success: function(jsonData)
            {
                console.log(jsonData);
            }
        });
    });

Thanks for help.